Pent-4-yn-1-amine hydrochloride is primarily used in organic synthesis as a building block for the preparation of more complex molecules. Its terminal alkyne group makes it a valuable reagent in click chemistry, particularly in copper-catalyzed azide-alkyne cycloaddition (CuAAC) reactions, which are widely employed in drug discovery, bioconjugation, and materials science. The amine group allows for further functionalization, enabling its use in the synthesis of pharmaceuticals, agrochemicals, and bioactive compounds. Additionally, it serves as a precursor in the development of polymers and dendrimers, where its reactivity can be exploited to create tailored structures with specific properties.